michael liptak



M4/2M; WMM

M. LIPTAK.

FURNACE ARCH FOR BOILERb.

APPLICATION min FEB; 9, 191s.

Mj/Hawkes L 2K. 540% M. LIPTAK.

FURNACE ARCH FOR BOILERS.

APPLlcATloN FlLED FEB. 9, |918.v

Jig. 5.

Patented Dec. 30, 12H9.

2 SHEETS-SHEET 2.

rif-enr j Fries.

remmen-nnen; non serrures.

To all automat may concern.'

Be it known that I, MICHAEL Lrr'rArr, re-

i siding at Minneapolis, in the county of Henllt) nepin and State ofMinnesota, have invented certain new and useful improvements inFurnace-Arches for Boilers; and do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled 'in the art to which it appertains to make and use thesame.

. My invention has for its object to provide an improved furnace archfor boilers .orl

steam generating plants; and to such ends, generally stated, theinvention consists of the novel construction and combinations of partshereinafter described and defined in the claims.'

The' general nature and purpose of the furnacearches used in thecombustion chambers of steam boilers is well known.

My invention provides particularly, an improved arrangement ofinterlocking arch forming blocks and supporting beams which make theerection of the fire arch, in the iirst instance, an easy matter andwhich also make it an easy matter to maintain the same by replacement,from time to time, of those blocks or the arch that have been burnedaway or damaged by the intense heat from t e Yfurnace. This improvedtire arch involves as aradicallynew feature, a double' layer arrangementof interlocking blocks so disposed in respect to each other and tothesupporting beams that the blocks that are directly hung on the beams'are not exposed to the dames, or otherwise stated, blocks exposed tothe direct action of the flames are not directly hung on the metal beamsbut are indirectly hung from hanger blocks' which, iny turn, are hung.from the supporting beams and thereby protected from the flames. Theblocks that are directly hung 'fromthe supporting beams are des1gnatkedas hanger blocks, while the blocks that are hung from the hanger blocksso that they are at the under surface of the arch and exposed to thedirect action of the most intense llames, are. designated as underfacingblocks. There are ample air spaces between the hanger blocks andunderfacing blocksand between the hanger blocks and the metal .beams sothat the beams will always be kept cool.

The preferred -form of the arch is illustrated in the accompanyingdrawings where- Specication of Letters Patent. Patented Dec, 30, 1919,.application inea February e, isis serial no. eiaisa.

in like characters indicate'like parte through-l out the several views.

Referringto the drawings,

Figure 1 is a verticalsection taken through the iire box and arch on theline 2--2 of Fig. 2, some parts being' shown in full;

Fig. 2 is a transverse section, the right hand half thereof, being asection on the line 2 2 of F ig. 1, and the left hand half thereof,being a section on the line 2-2 of Fig.. l, and some parts beingremoved;

Fig. 3 is a perspective view of the arch, some partsy 'being removed andsome parts being sectioned; and

Fig. 4 is a transverse vertical section illusvtrating a slightlymodilied construction of and front walls of the masonry, and the frontends of the lower dues 6, in accordance with my invention', areconstructed as follows:

' The main supporting beams of the arch are, as shown, two in number andthey are transversely extended, their ends being embedded in the side"walls of the masonry.

Preferably, the front main supporting beam is'in the form of a steel oriron channel 8 while the innermost or front `main beam is 1n the form ofa steel or iron I-beam 9. A

multiplicity of laterally spaced supplemental beams are hung from thelower lano'es of the main beams 8 and 9 and these supp eine-ntal beams10 are preferably steel 0r iron Lbeams having relatively narrow lian esat their upper edges and relatively wide flanges at their lower edges.To thus hang or suspend the supplemental beams 10 from the main beamsSand 9, I provide said supplemental beams on their upper edge flangeswithlongitudinally slidable coupling brackets 11, l2 and .13,which arealike, except that the brackets 11 are longer than the brackets 12 and13. All of the said brackets are provided at their ends with projectinghanger lugs thatengage over the lower flanges of the adjacent mainbeams, as shown in Figs. 1 and 3. The hanger'brackets 12 and 13 arealike but are faced in opposite directions. To interlock the said hangerbrackets with the. upper iianges of the supplemental beams 10 they areformed with longitudinal T-shaped grooves in their lower faces, and tosecure them in working position, as shown, they are preferably providedwith suitable set screws 14.

For an important purpose which will hereinafter appear, the supplementalbeams 10 are provided at their inner ends with detachable beam tips 10,the ianges of which correspond to the flanges of the said beamsv10, butthe upper inner portions of which are preferably cut away on rectangularlines, as best shown in Fig. 3. The narrow upper flanges of the saidbeam tips 10 are telescoped into the projecting ends of the couplingbrackets 11, and rigidly secured thereto by the outer of the set screwsthereof.

rlhe brick work of the improved arch is made up preferably of hanger.blocks 15 and 16, underfacing blocks 17, corner facing blocks 18,crowning blocks 19` and usually l more or less filling-in bricks 20, allof which The outer edge blocks 16 are channeled in vone face only, thatis, each is substantially one-half of one of the blocks 15 that is madea little wider and is parti embedded in the walls of the masonry, as estshown in Fig. 2. The intervening blocks 17, on their upper sides, areformed with T-shaped flanges that slide into the channels formed by thedepending T-shaped portions of the hanger blocks 15- and 16 andinterlock therewith and rest upon the lower flanges of the said hangerblocks with freedom, of course, for sliding movements into position andfrom position. -The said blocks above noted are, of course,plositioned'in close contact. The innermost anger blocks 17 are suported by the detachable beam tips 10a.. ner facing blocks 18, ,insteadof having T- shaped upper end flanges, are formed with T-shaped seatsthat terminate short of the front ends thereof, but adapt' them to beslid onto the lower flanges of the innermost hanger blocks 17, whichlatter, as just above noted, are supported by the said beam tips.

i Hence, the said corner blocks are indirectly supported from the saidbeam tips 10, and the said beam tips are protected from intense heat bysaid corner blocks as well as b the innermost hanger blocks. In fact, itwill be noted that no parts of the metallic supporting beam are exposedto the direct action of Y sharp angles.

weaves the fiames of the furnace. The crowning blocks 19, in verticalsection, are L-shaped so that they nt over and rest upon the projectingends of the innermost hanger blocks 15 and -1d. The space lbetween thetops of the-blocks 19 and the iues, is lled in by ordinary re brick 20.Slight space is left between the corner facing blocks and the crowningblocks, so that the former will be free from the weight of the latter.

The corner facing bricks 18 will be subjected to the most intense heatand will be burned away faster than any of the other blocks, and hence,will require more frequent replacement. Obviously, these corner blocksmay be very quickly and easily replaced and without removing any of theother blocks. Moreover, if these blocks should be so badly burned `awaythat the flames would melt the ends of the beamtips 10, these latter maybe also easily cheaply and quickly replaced y by others of likecharacter. Obviously the construction is also such that any or all, forthat matter, of the exposed arch blocks may bereplaced. When they arehung, as described, they afford a very eiicient arch and thoroughlyprotect the metallic supporting beams.

Fig. 4 shows hanger blocks and underfacing blocks of the same generalconstruction as above described, but slightly modified so that sharpangles are avoided in the weaker portions of the blocks. In the saidmodified construction, Fig. 4, the hangerblocks 15l have rounded uppersurfaces and the upper and lower flanges are united to the verticalportions thereof by rounded surfaces that avoid sharp angles. Likewise,the underfacing blocks 17a have their vertical webs `united to the upperflanges and body portions by rounded surfaces which avoid the Sharpangles, as is well known, render the-ianges more liable to be broken olfthan where the joining surfaces are rounded.

As is evident, preferably by reference to Figs. 1 and 3, the cornerblocks 18 and underfacing blocks 17 may be slid to and from positionunder the crowning blocks 19.

When the arch is com lets, the metal beams of the arch, as alieady fullydescribed, are not in contact with any arch block that is exposed to thedirect action of the ames, and hence, are well protected from the heat.With this double layer arrangement of the blocks in the arch, not onlyis the life of the arch very greatly increased but replacement ofblocksis made an easy matter. The manner in which the undersur of thestandard arches made up of a single` layer of blocks. This improved archwill therefore last for a comparatively long time and may be used for: aconsiderable time `even after the underfacing blocks have been burnedaway. This'will give plenty of notice in advance that the arch must besoon repaired, and moreover, will usually fmakethe possible life of thearch 'long I blocks and forminga lower layer to be ex,

, enough so that repairs therein will not be necessary except at timeswhen it is necessary to shut down .the boiler for repairs 1n the boileritself. v

With the customary single layer arch, 'it has been necessary tofrequently shut down the boiler and put out the {ire at times when noboiler repairs were necessary and where -the shut down with the resultof loss of time,

waste of coal and expense generally, was due solely to repairs requiredin the fire arch itself.

What I claim is:

1. A fire arch for furnaces comprising hanger blocks supported inv an'upper layer, and underfacing blocks interlocked` to and detachably hungfrom said hanger blocks andforming a lower layer to be exposed to theflames'.

2. A fire arch for furnaces comprising hanger blocks supported in anupper layer, and underfacing blocks interlocked to Aand detachably hungfrom said hanger blocks and forming a lower layer to be exposed kto theflames, the said Vhanger and under- Tfacing blocks having joints thatare lapped ,in a vertical direction with air spaces between said blocksin the vicinity of their interlocking joints.

3. .A furnace arch vcomprising laterally spaced beams, hanger blocksslidably hung on said beams and forming an upper layer, and underfacingblocks interlocked with and detachably hung from said hanger posed tothe flames. i

4. A furnace arch ycomprising laterally spaced beams, hanger blocksslidably hung on said beams and forming anupper layer, underfacingblocks interlocked with and detachably hung;` from said hanger blocksand forming a lower layer that is exposed to the flames, the inner`members of said hanger blocks being proje'ctedrearward of the inner`ends of said beams, and corner facing blocks detachably hung on theprojecting ends of said hangerblocks.

'5. A furnace arch com risin laterally spaced beams, hanger blocs sliably hung on said beams and forming an upper layer, underfacing blocksinterlocked with and detachably hung from said hanger blocks and forminga lower layer thatcis exposed to the flames, the inner-members of saidhanger blocks being projected. rearward of the inner' ends of saidbeams, corner facing blocks detachably hung on. the projecting ends ofsaid hanger-blocks, andan apron wall sup- -ported by theinner ends ofsaid beams, the

joints and permit sliding movements of said lower blocks in respect tosaid upper blocks. I

7. A furnace arch comprising transverse main hanger beams, laterallyspaced supplemental beams underlying said main beams, said supplementalbeams having. replaceable end ti s detachably secured to the inner` endstiereof, hanger blocks slidably interlocked to said supplemental beamsand the beamtips thereof, underfa'cing blocks slid'- ably locked to saidhanger blocks and. corner facing blocks detachably supported by theinnermost of said hanger blocks'. y

8. A furnace arch comprising transverse main hanger beams, laterallyspaced supplemental beams underlying said main beams, said supplementalbeams having replaceable end tips detachably secured to the inner ends'thereof, hanger blocks slidably interlocked to said supplemental beamsand the beam tips. thereof, underfacing blocks slidably lockedto saidhanger blocks and corner facing blocks detachably interlocked to theinnermost of said'hanger blocks, and approximately L-shaped crowningblocks set over 'saidcorner facing blocks and resting on the innermostof said hanger blocks.

9. The combination with suitably sup portedlaterally spaced hanger beamshaving replaceable end tips detachably secured f to their inner ends,hangerk blocksslidably hungr on said beams and their replaceable endtips, and underfacingblocks slidably and replaceably hung on said hangerblocks.

10. The combination with suitably suplnloclis constituting a lower layerand having at their upper portions anged necls of reduced width arrangedto detachably inter? said beams and constituting an upper layer andunderacing blocks detacliably hung 'from said hanger blocks andconstituting a lower layer.

18. A furnace comprising parallel supporting beams, hanger blocks hungfrom said beams, under facing blocks interlocked 'with and hung fromsaid hanger blocks, corner facing blocks interlocked to the end membersof said hanger blocks, and crowning blocks applied on the inner membersof said hanger blocks, ther'said corner blocks projecting inward of saidcrowning blocks and serving as flame deiectors to protect said crowningblocks..

In testimony whereof I aiiix my signature in presence of two witnesses.MICHAEL LIPTAK.

Witnesses BERNICE G. BAUMANN, F. D., MERCHANT.

